diff --git a/YACOSWeb/WebContent/WEB-INF/applicationContextAcegi.xml b/YACOSWeb/WebContent/WEB-INF/applicationContextAcegi.xml
index 690d63a..569b1c0 100644
--- a/YACOSWeb/WebContent/WEB-INF/applicationContextAcegi.xml
+++ b/YACOSWeb/WebContent/WEB-INF/applicationContextAcegi.xml
@@ -68,12 +68,12 @@ http://www.springframework.org/schema/beans http://www.springframework.org/schem
   </property>
 </bean>
 
-<bean id="userDetailsService" class="org.acegisecurity.userdetails.memory.InMemoryDaoImpl">
-  <property name="userProperties">
-    <bean class="org.springframework.beans.factory.config.PropertiesFactoryBean">
-      <property name="location" value="/WEB-INF/users.properties"/>
-    </bean>
-  </property>
+<bean id="userDetailsService" class="org.yacos.auth.UserDetailsService">
+<!--  <property name="userProperties">-->
+<!--    <bean class="org.springframework.beans.factory.config.PropertiesFactoryBean">-->
+<!--      <property name="location" value="/WEB-INF/users.properties"/>-->
+<!--    </bean>-->
+<!--  </property>-->
 </bean>
 
 
@@ -137,4 +137,9 @@ http://www.springframework.org/schema/beans http://www.springframework.org/schem
 
 <bean id="loggerListener" class="org.acegisecurity.event.authentication.LoggerListener"/>
 
+
+<!--<bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalEntityManagerFactoryBean">-->
+<!--	<property name="persistenceUnitName" value="YACOSCore"/>-->
+<!--</bean>-->
+
 </beans>
\ No newline at end of file
diff --git a/YACOSWeb/WebContent/WEB-INF/web.xml b/YACOSWeb/WebContent/WEB-INF/web.xml
index dfe6267..3eaa3da 100644
--- a/YACOSWeb/WebContent/WEB-INF/web.xml
+++ b/YACOSWeb/WebContent/WEB-INF/web.xml
@@ -42,6 +42,11 @@
         <filter-name>lazyLoadingFilter</filter-name>
         <filter-class>org.springframework.orm.jpa.support.OpenEntityManagerInViewFilter</filter-class>
     </filter>
+   <filter-mapping>
+   		<filter-name>lazyLoadingFilter</filter-name>
+  		<url-pattern>/onverracaplustard</url-pattern>
+  </filter-mapping>
+    
 	
 	<!-- Acegi Security declaration Start -->
 	<filter>
@@ -88,7 +93,7 @@
 	<filter>
 		<filter-name>SessionService</filter-name>
 		<filter-class>
-			org.yacos.web.system.controller.SessionService
+			org.yacos.web.system.session.SessionServiceFilter
 		</filter-class>
 	</filter>
 	
diff --git a/YACOSWeb/WebContent/WEB-INF/yacos-servlet.xml b/YACOSWeb/WebContent/WEB-INF/yacos-servlet.xml
index c05c0a3..af9c2ce 100644
--- a/YACOSWeb/WebContent/WEB-INF/yacos-servlet.xml
+++ b/YACOSWeb/WebContent/WEB-INF/yacos-servlet.xml
@@ -84,7 +84,6 @@
 	<bean id="ListArticleController"
 		class="org.yacos.web.PCmember.controller.ListArticleController">
 		<property name="articleManager" ref="articleManager" />
-		<property name="sessionService" ref="sessionService" />
 	</bean>
 
 	<bean id="SUserRegistrationController"
@@ -96,7 +95,6 @@
 		<property name="formView" value="registerUser.htm" />
 		<property name="successView" value="listArticle.htm" />
 		<property name="userManager" ref="userManager" />
-		<property name="sessionService" ref="sessionService" />
 	</bean>
 
 	<bean id="SArticleController"
@@ -121,7 +119,6 @@
 		<property name="articleManager" ref="articleManager" />
 		<property name="userManager" ref="userManager" />
 		<property name="conferenceManager" ref="conferenceManager" />
-		<property name="sessionService" ref="sessionService" />
 	</bean>
 
 	<bean id="DispatchArticleController"
@@ -135,7 +132,6 @@
 		<property name="articleManager" ref="articleManager" />
 		<property name="userManager" ref="userManager" />
 		<property name="conferenceManager" ref="conferenceManager" />
-		<!-- <property name="sessionService" ref="sessionService" /> -->
 	</bean>
 
 	<bean id="AddConferenceController5"
@@ -218,7 +214,6 @@
 	<!-- Get chosen conference in session context -->
 	<bean id="ChooseConferenceController"
 		class="org.yacos.web.system.controller.ChooseConferenceController">
-		<property name="sessionService" ref="sessionService" />
 	</bean>
 
 
@@ -278,7 +273,7 @@
 
 
 	<bean id="sessionService"
-		class="org.yacos.web.system.controller.SessionService">
+		class="org.yacos.web.system.session.SessionService">
 		<property name="conferenceManager" ref="conferenceManager" />
 		<property name="userManager" ref="userManager" />
 	</bean>
@@ -290,4 +285,4 @@
 		jndi-name="UserManagerBean/remote" cache="true" />
 	<jee:jndi-lookup id="conferenceManager"
 		jndi-name="ConferenceManagerBean/remote" cache="true" />
-</beans>
\ No newline at end of file
+</beans>
diff --git a/YACOSWeb/src/org/yacos/auth/UserDetails.java b/YACOSWeb/src/org/yacos/auth/UserDetails.java
new file mode 100644
index 0000000..103f708
--- /dev/null
+++ b/YACOSWeb/src/org/yacos/auth/UserDetails.java
@@ -0,0 +1,111 @@
+package org.yacos.auth;
+
+import java.util.ArrayList;
+import java.util.List;
+import org.acegisecurity.GrantedAuthority;
+import org.acegisecurity.GrantedAuthorityImpl;
+import org.yacos.core.users.Role;
+import org.yacos.core.users.User;
+import org.yacos.web.system.session.SessionService;
+
+public class UserDetails implements org.acegisecurity.userdetails.UserDetails {
+	/**
+	 * 
+	 */
+	private static final long serialVersionUID = 1L;
+	
+	private String login;
+	/**
+	 * Password : used for authentication purpose only, is only writable
+	 */
+	private String password;
+	/**
+	 * First Name of the user
+	 */
+	private String firstName;
+	/**
+	 * Last name of the user
+	 */
+	private String lastName;
+	/**
+	 * Organization or lab the user belongs to
+	 */
+	private String organization;
+	/**
+	 * Active email (has to be used frequently) of the user
+	 */
+	private String email;
+	
+	public UserDetails(User user) {
+		this.login = user.getLogin();
+		this.password = user.getPassword();
+		this.firstName = user.getFirstName();
+		this.lastName = user.getLastName();
+		this.organization = user.getOrganization();
+		this.email = user.getEmail();
+	}
+
+	public GrantedAuthority[] getAuthorities() {
+		Integer currentConferenceId = SessionService.getInstance().getCurrentConferenceId();
+		
+		GrantedAuthority[] authorities = null;
+		
+		if(currentConferenceId != null){
+			List<Role> rolesList = SessionService.getInstance().getConferenceManager().getRoles(login, currentConferenceId);
+			if(! rolesList.isEmpty()){
+				authorities = new GrantedAuthority[rolesList.size()];
+			}
+			
+			for(int i=0;i<rolesList.size();i++){
+				authorities[i] = new GrantedAuthorityImpl(rolesList.get(i).getType().name());
+			}
+		}
+		
+		return (GrantedAuthority[]) authorities;
+	}
+
+	public String getPassword() {
+		return password;
+	}
+
+	public String getUsername() {
+		return login;
+	}
+
+	public boolean isAccountNonExpired() {
+		return true;
+	}
+
+	public boolean isAccountNonLocked() {
+		return true;
+	}
+
+	public boolean isCredentialsNonExpired() {
+		return true;
+	}
+
+	public boolean isEnabled() {
+		return true;
+	}
+	
+	public String getLogin() {
+		return login;
+	}
+	
+	public String getFirstName() {
+		return firstName;
+	}
+	
+	public String getLastName() {
+		return lastName;
+	}
+	
+	public String getEmail() {
+		return email;
+	}
+	
+	public String getOrganization() {
+		return organization;
+	}
+
+}
diff --git a/YACOSWeb/src/org/yacos/auth/UserDetailsService.java b/YACOSWeb/src/org/yacos/auth/UserDetailsService.java
new file mode 100644
index 0000000..1281f17
--- /dev/null
+++ b/YACOSWeb/src/org/yacos/auth/UserDetailsService.java
@@ -0,0 +1,39 @@
+/**
+ * 
+ */
+package org.yacos.auth;
+
+import org.acegisecurity.userdetails.UsernameNotFoundException;
+import org.springframework.dao.DataAccessException;
+import org.springframework.dao.DataRetrievalFailureException;
+import org.yacos.core.users.User;
+import org.yacos.web.system.session.SessionService;
+
+/**
+ * User details service
+ * 
+ * @author christiancorsano
+ * 
+ */
+public class UserDetailsService implements
+		org.acegisecurity.userdetails.UserDetailsService {
+	/**
+	 * 
+	 */
+	public UserDetails loadUserByUsername(String login)
+			throws UsernameNotFoundException, DataAccessException {
+		User user;
+		try {
+			user = SessionService.getInstance().getUserManager().getUser(login);
+		} catch (Exception e){
+			throw new DataRetrievalFailureException("Couldn't retrieve the User "+login,e);
+		}
+		
+		if(user == null){
+			throw new UsernameNotFoundException(login);
+		}
+		
+		return new UserDetails(user);
+	}
+
+}
diff --git a/YACOSWeb/src/org/yacos/web/PCmember/controller/ChoosePreferenceController.java b/YACOSWeb/src/org/yacos/web/PCmember/controller/ChoosePreferenceController.java
index d4dcc76..b038d75 100644
--- a/YACOSWeb/src/org/yacos/web/PCmember/controller/ChoosePreferenceController.java
+++ b/YACOSWeb/src/org/yacos/web/PCmember/controller/ChoosePreferenceController.java
@@ -17,7 +17,7 @@ import org.yacos.core.users.IUserManager;
 import org.yacos.core.users.User;
 import org.yacos.web.PCmember.form.FormPreference;
 import org.yacos.web.system.controller.NoConferenceSelectedException;
-import org.yacos.web.system.controller.SessionService;
+import org.yacos.web.system.session.SessionService;
 
 public class ChoosePreferenceController  extends SimpleFormController {
 
@@ -27,13 +27,12 @@ public class ChoosePreferenceController  extends SimpleFormController {
 	private IArticleManager articleManager;
 	private IUserManager userManager;
 	private IConferenceManager conferenceManager;
-	private SessionService sessionService;
 
 
 	@Override
 	protected Object formBackingObject(HttpServletRequest request)
 			throws Exception {
-		Integer currentConferenceId = sessionService.getCurrentConferenceId(request);
+		Integer currentConferenceId = SessionService.getInstance().getCurrentConferenceId();
 		
 		if(currentConferenceId == null){
 			throw new NoConferenceSelectedException();
@@ -112,12 +111,4 @@ public class ChoosePreferenceController  extends SimpleFormController {
 	public void setConferenceManager(IConferenceManager conferenceManager) {
 		this.conferenceManager = conferenceManager;
 	}
-	
-	public SessionService getSessionService() {
-		return sessionService;
-	}
-	
-	public void setSessionService(SessionService sessionService) {
-		this.sessionService = sessionService;
-	}
 }
\ No newline at end of file
diff --git a/YACOSWeb/src/org/yacos/web/PCmember/controller/DispatchArticleController.java b/YACOSWeb/src/org/yacos/web/PCmember/controller/DispatchArticleController.java
index a5ca553..8082c59 100644
--- a/YACOSWeb/src/org/yacos/web/PCmember/controller/DispatchArticleController.java
+++ b/YACOSWeb/src/org/yacos/web/PCmember/controller/DispatchArticleController.java
@@ -14,14 +14,13 @@ import org.yacos.core.article.IArticleManager;
 import org.yacos.core.exceptions.ConferenceDoesntExistException;
 import org.yacos.core.users.User;
 import org.yacos.web.PCmember.form.FormDispatcher;
-import org.yacos.web.system.controller.SessionService;
+import org.yacos.web.system.session.SessionService;
 
 public class DispatchArticleController extends SimpleFormController{
 
 	protected final Log logger = LogFactory.getLog(getClass());
 	
 	private IArticleManager articleManager;
-	private SessionService sessionService;
 	
 	public IArticleManager getArticleManager() {
 		return articleManager;
@@ -30,15 +29,6 @@ public class DispatchArticleController extends SimpleFormController{
 		this.articleManager = articleManager;
 	}
 	
-	public SessionService getSessionService() {
-		return sessionService;
-	}
-	
-	public void setSessionService(SessionService sessionService) {
-		this.sessionService = sessionService;
-	}
-	
-	
 	protected Object formBackingObject(HttpServletRequest request) throws ConferenceDoesntExistException {
 		logger.info("Returning dispatcher view");
 
@@ -49,7 +39,7 @@ public class DispatchArticleController extends SimpleFormController{
 		members.add(m2);
 		// TODO : use the formBackingObject to store these
 		request.getSession().setAttribute("members",members);
-		Integer currentConferenceId = sessionService.getCurrentConferenceId(request);
+		Integer currentConferenceId = SessionService.getInstance().getCurrentConferenceId();
 		// TODO : Fix that, we should use the form backing object instead of the session to store the articles
 		request.getSession().setAttribute("articles",articleManager.getArticles(currentConferenceId));
 		logger.info(articleManager.getArticles(currentConferenceId));
@@ -71,7 +61,7 @@ public class DispatchArticleController extends SimpleFormController{
 		
 		request.getSession().setAttribute("members",members);
 
-		Integer currentConferenceId = sessionService.getCurrentConferenceId(request);
+		Integer currentConferenceId = SessionService.getInstance().getCurrentConferenceId();
 		
 		return new ModelAndView("dispatchArticle", "articles", articleManager.getArticles(currentConferenceId) );
 	}
diff --git a/YACOSWeb/src/org/yacos/web/PCmember/controller/EvaluationController.java b/YACOSWeb/src/org/yacos/web/PCmember/controller/EvaluationController.java
index 142dbe0..cfcf886 100644
--- a/YACOSWeb/src/org/yacos/web/PCmember/controller/EvaluationController.java
+++ b/YACOSWeb/src/org/yacos/web/PCmember/controller/EvaluationController.java
@@ -102,13 +102,8 @@ public class EvaluationController  extends SimpleFormController {
 		if(toto == null){
 			toto = userManager.addUser("toto", "toto", "Toto", "Toto", "Toto corp.", "toto@totocorp.com");
 		}
-		Report rpt =new Report();
-		rpt.setArticle(article);
-		rpt.setCommentAuthor(commentAuthor);
-		rpt.setCommentPCMember(commentPCMember);
-		rpt.setRatings(listeRating);
-		rpt.setReferee(toto);
 		
+		Report rpt =new Report(commentPCMember,commentAuthor,listeRating,toto,article);		
 		
 		request.getSession().setAttribute("report", rpt);
 		//Map<String, Report> model1 = new HashMap<String, Report>();
diff --git a/YACOSWeb/src/org/yacos/web/PCmember/controller/ListArticleController.java b/YACOSWeb/src/org/yacos/web/PCmember/controller/ListArticleController.java
index d79c19a..a3ba86f 100644
--- a/YACOSWeb/src/org/yacos/web/PCmember/controller/ListArticleController.java
+++ b/YACOSWeb/src/org/yacos/web/PCmember/controller/ListArticleController.java
@@ -11,7 +11,7 @@ import org.apache.commons.logging.LogFactory;
 import java.io.IOException;
 import java.util.List;
 import org.yacos.web.system.controller.NoConferenceSelectedException;
-import org.yacos.web.system.controller.SessionService;
+import org.yacos.web.system.session.SessionService;
 import org.yacos.core.article.Article;
 import org.yacos.core.article.IArticleManager;
 import org.yacos.core.exceptions.ConferenceDoesntExistException;
@@ -22,8 +22,6 @@ public class ListArticleController extends SimpleFormController {
     
     private IArticleManager articleManager;
 
-	private SessionService sessionService;
-
 	public ModelAndView handleRequest(HttpServletRequest request, HttpServletResponse response)
             throws ServletException, IOException, NoConferenceSelectedException {
 		
@@ -31,7 +29,7 @@ public class ListArticleController extends SimpleFormController {
         
         List<Article> listArticle;
 		try {
-			listArticle = articleManager.getArticles(sessionService.getCurrentConferenceId(request));
+			listArticle = articleManager.getArticles(SessionService.getInstance().getCurrentConferenceId());
 			getServletContext().setAttribute("listArticle", listArticle);
 		} catch (ConferenceDoesntExistException e) {
 			logger.error(e.getMessage());
@@ -47,11 +45,4 @@ public class ListArticleController extends SimpleFormController {
 	public void setArticleManager(IArticleManager articleManager) {
 		this.articleManager = articleManager;
 	}
-
-	public SessionService getSessionService() {
-		return sessionService;
-	}
-	public void setSessionService(SessionService sessionService) {
-		this.sessionService = sessionService;
-	}
 }
\ No newline at end of file
diff --git a/YACOSWeb/src/org/yacos/web/author/controller/SArticleController.java b/YACOSWeb/src/org/yacos/web/author/controller/SArticleController.java
index b2a2e00..670f55d 100644
--- a/YACOSWeb/src/org/yacos/web/author/controller/SArticleController.java
+++ b/YACOSWeb/src/org/yacos/web/author/controller/SArticleController.java
@@ -16,7 +16,7 @@ import org.springframework.web.multipart.MultipartFile;
 import org.springframework.web.servlet.ModelAndView;
 import org.springframework.web.servlet.mvc.SimpleFormController;
 import org.springframework.web.servlet.view.RedirectView;
-import org.yacos.web.system.controller.SessionService;
+import org.yacos.web.system.session.SessionService;
 import org.yacos.core.article.Article;
 import org.yacos.core.article.IArticleManager;
 import org.yacos.core.conferences.Conference;
@@ -29,16 +29,15 @@ public class SArticleController extends SimpleFormController {
 	protected final Log logger = LogFactory.getLog(getClass());
 
 	private IArticleManager articleManager;
-	private SessionService sessionService;
 
 	public ModelAndView onSubmit(HttpServletRequest request,
 			HttpServletResponse response, Object command, BindException errors)
 	throws ServletException, IllegalStateException {
 
 		// Fetching conference
-		Conference conf = sessionService.getCurrentConference(request);
+		Conference conf = SessionService.getInstance().getCurrentConference();
 		// Fetching user
-		User user = sessionService.getCurrentUser(request);
+		User user = SessionService.getInstance().getCurrentUser();
 		
 		String title = ((FormSubmission) command).getTitle();
 		String theme = ((FormSubmission) command).getTheme();
@@ -95,12 +94,4 @@ public class SArticleController extends SimpleFormController {
 	public void setArticleManager(IArticleManager articleManager) {
 		this.articleManager = articleManager;
 	}
-
-	public SessionService getSessionService() {
-		return sessionService;
-	}
-
-	public void setSessionService(SessionService sessionService) {
-		this.sessionService = sessionService;
-	}
 }
\ No newline at end of file
diff --git a/YACOSWeb/src/org/yacos/web/system/controller/ChooseConferenceController.java b/YACOSWeb/src/org/yacos/web/system/controller/ChooseConferenceController.java
index 8e7f0d6..0ba747c 100644
--- a/YACOSWeb/src/org/yacos/web/system/controller/ChooseConferenceController.java
+++ b/YACOSWeb/src/org/yacos/web/system/controller/ChooseConferenceController.java
@@ -4,26 +4,18 @@ import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
 import org.springframework.web.servlet.ModelAndView;
 import org.springframework.web.servlet.mvc.Controller;
+import org.yacos.web.system.session.SessionService;
 
 public class ChooseConferenceController implements Controller {
-	private SessionService sessionService;
-	
-	public SessionService getSessionService() {
-		return sessionService;
-	}
-	
-	public void setSessionService(SessionService sessionService) {
-		this.sessionService = sessionService;
-	}
 	
 	public ModelAndView handleRequest(HttpServletRequest request,
 			HttpServletResponse response) throws Exception {
 
-		// get IDConf 
+		// get IDConf
 		int idConf = Integer.parseInt(request.getParameter("idConf")); 
 		
 		// Set idConf in session context
-		sessionService.setCurrentConferenceId(request, idConf);
+		SessionService.getInstance().setCurrentConferenceId(idConf);
 
 		return new ModelAndView("main"); 
 	}
diff --git a/YACOSWeb/src/org/yacos/web/system/controller/SUserRegistrationController.java b/YACOSWeb/src/org/yacos/web/system/controller/SUserRegistrationController.java
index ded8a16..0349832 100644
--- a/YACOSWeb/src/org/yacos/web/system/controller/SUserRegistrationController.java
+++ b/YACOSWeb/src/org/yacos/web/system/controller/SUserRegistrationController.java
@@ -13,6 +13,7 @@ import org.springframework.web.servlet.view.RedirectView;
 import org.yacos.core.users.IUserManager;
 import org.yacos.core.users.User;
 import org.yacos.web.system.form.FormUser;
+import org.yacos.web.system.session.SessionService;
 
 /**
  * FormController class for the user Sign In scenario (user registration)
@@ -24,17 +25,6 @@ import org.yacos.web.system.form.FormUser;
  */
 public class SUserRegistrationController extends SimpleFormController {
 	private IUserManager userManager;
-	
-	private SessionService sessionService;
-	
-	public SessionService getSessionService() {
-		return sessionService;
-	}
-	
-	public void setSessionService(SessionService sessionService) {
-		this.sessionService = sessionService;
-	}
-	
 	/**
 	 * @see org.springframework.web.servlet.mvc.SimpleFormController#onSubmit(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse, java.lang.Object, org.springframework.validation.BindException)
 	 */
@@ -45,7 +35,7 @@ public class SUserRegistrationController extends SimpleFormController {
 		FormUser userCommand = (FormUser) command;
 		
 		// Tries to retrieve the current user : case of user modification
-		User user = sessionService.getCurrentUser(request);
+		User user = SessionService.getInstance().getCurrentUser();
 		
 		if( (userCommand.getIsNew()) && (userManager.getUser(userCommand.getLogin()) != null)){
 			errors.rejectValue("login", "form.register.error.alreadyExists");
@@ -87,9 +77,9 @@ public class SUserRegistrationController extends SimpleFormController {
 		User currentUser = new User();
 		user.setIsNew(true);
 		// TODO : see how JAAS could change the way of getting the current User
-		if(sessionService.isUserLogged(request)){
+		if(SessionService.getInstance().isUserLogged()){
 			// If he is logged, we use his profile information to fill the form
-			currentUser = (User) sessionService.getCurrentUser(request);
+			currentUser = (User) SessionService.getInstance().getCurrentUser();
 			user.setIsNew(false);
 		}
 		
diff --git a/YACOSWeb/src/org/yacos/web/system/controller/SessionService.java b/YACOSWeb/src/org/yacos/web/system/session/SessionService.java
similarity index 68%
rename from YACOSWeb/src/org/yacos/web/system/controller/SessionService.java
rename to YACOSWeb/src/org/yacos/web/system/session/SessionService.java
index df852c4..3ab801f 100644
--- a/YACOSWeb/src/org/yacos/web/system/controller/SessionService.java
+++ b/YACOSWeb/src/org/yacos/web/system/session/SessionService.java
@@ -1,17 +1,9 @@
-package org.yacos.web.system.controller;
-
-import java.io.IOException;
+package org.yacos.web.system.session;
 
 import javax.naming.Context;
 import javax.naming.InitialContext;
 import javax.naming.NamingException;
-import javax.servlet.Filter;
-import javax.servlet.FilterChain;
-import javax.servlet.FilterConfig;
 import javax.servlet.ServletContext;
-import javax.servlet.ServletException;
-import javax.servlet.ServletRequest;
-import javax.servlet.ServletResponse;
 import javax.servlet.http.HttpServletRequest;
 import org.springframework.web.util.WebUtils;
 import org.yacos.core.conferences.Conference;
@@ -24,9 +16,11 @@ import org.yacos.core.users.User;
  * @author christiancorsano
  *
  */
-public class SessionService implements Filter {
-	private static ServletContext servletContext = null;
-	private static HttpServletRequest request = null;
+public class SessionService {
+	private static SessionService instance = new SessionService();
+	
+	protected static ServletContext servletContext = null;
+	protected static HttpServletRequest request = null;
 	
 	private IConferenceManager conferenceManager;
 	private IUserManager userManager;
@@ -34,14 +28,21 @@ public class SessionService implements Filter {
 	private User currentUser;
 	private Conference currentConference;
 	
-	public SessionService(){
+	private SessionService(){
+	}
+	
+	public static SessionService getInstance(){
+		if(instance == null){
+			instance = new SessionService();
+		}
+		return instance;
 	}
 	
 	/**
 	 * Init method to be called at filter time
 	 * Makes the sessionAttributes available in the request context
 	 */
-	private void init(){
+	protected void init(){
 		if(request != null && servletContext != null){
 			try {
 				if(userManager == null || conferenceManager == null){
@@ -51,10 +52,10 @@ public class SessionService implements Filter {
 				}
 				// Put the current conference in the request context to make it accessible in JSPs
 				// This avoid to put the whole object in the session
-				request.setAttribute("currentConference", getCurrentConference(request));
+				request.setAttribute("currentConference", getCurrentConference());
 				// Put the current conference in the request context to make it accessible in JSPs
 				// This avoid to put the whole object in the session
-				request.setAttribute("currentUser", getCurrentUser(request));
+				request.setAttribute("currentUser", getCurrentUser());
 			} catch (NamingException e) {
 				// TODO Auto-generated catch block
 				e.printStackTrace();
@@ -85,7 +86,7 @@ public class SessionService implements Filter {
 	 * @param request The current HTTP request object, necessary for session operations
 	 * @return The current conference id
 	 */
-	public Integer getCurrentConferenceId(HttpServletRequest request) {
+	public Integer getCurrentConferenceId() {
 		// Retrieve the ID from the session
 		Integer confId = (Integer) WebUtils.getSessionAttribute(request, "currentConferenceId");
 		return confId;
@@ -96,7 +97,7 @@ public class SessionService implements Filter {
 	 * @param request The current HTTP request object, necessary for session operations
 	 * @param currentConferenceId The id to set as the new current conference
 	 */
-	public void setCurrentConferenceId(HttpServletRequest request,Integer currentConferenceId) {
+	public void setCurrentConferenceId(Integer currentConferenceId) {
 		WebUtils.setSessionAttribute(request, "currentConferenceId", currentConferenceId);
 		currentConference = conferenceManager.getConference(currentConferenceId);
 		request.setAttribute("currentConference", currentConference);
@@ -107,8 +108,8 @@ public class SessionService implements Filter {
 	 * @param request The current HTTP request object, necessary for session operations
 	 * @param c The conference object to set as current
 	 */
-	public void setCurrentConference(HttpServletRequest request, Conference c){
-		setCurrentConferenceId(request, c.getId() );
+	public void setCurrentConference(Conference c){
+		setCurrentConferenceId( c.getId() );
 		currentConference = c;
 	}
 	
@@ -117,8 +118,8 @@ public class SessionService implements Filter {
 	 * @param request The current HTTP request object, necessary for session operations
 	 * @return The conference object
 	 */
-	public Conference getCurrentConference(HttpServletRequest request){
-		Integer id = getCurrentConferenceId(request);
+	public Conference getCurrentConference(){
+		Integer id = getCurrentConferenceId();
 		
 		// The currentConference can be out to date : force the update
 		if(currentConference != null && id != currentConference.getId()){
@@ -136,9 +137,9 @@ public class SessionService implements Filter {
 	 * @param request The current HTTP request object, necessary for session operations
 	 * @param currentUser The new current user to set
 	 */
-	public void setCurrentUser(HttpServletRequest request,User currentUser) {
+	public void setCurrentUser(User currentUser) {
 		this.currentUser = currentUser;
-		this.setCurrentUserLogin(request,currentUser.getLogin());
+		this.setCurrentUserLogin(currentUser.getLogin());
 	}
 	
 	/**
@@ -146,7 +147,7 @@ public class SessionService implements Filter {
 	 * @param request The current HTTP request object, necessary for session operations
 	 * @param login The new current user login
 	 */
-	public void setCurrentUserLogin(HttpServletRequest request, String login) {
+	public void setCurrentUserLogin(String login) {
 		WebUtils.setSessionAttribute(request, "currentUserLogin", login);
 		currentUser = userManager.getUser(login);
 		request.setAttribute("currentUser", currentUser);
@@ -159,7 +160,7 @@ public class SessionService implements Filter {
 	 * @param request The current HTTP request object, necessary for session operations
 	 * @return The current user login
 	 */
-	public String getCurrentUserLogin(HttpServletRequest request){
+	public String getCurrentUserLogin(){
 		// Retrieve the login from the session
 		String login = (String) WebUtils.getSessionAttribute(request, "currentUserLogin");
 		return login;
@@ -167,12 +168,11 @@ public class SessionService implements Filter {
 	
 	/**
 	 * Get (if necessary) and returns the current user object
-	 * @param request The current HTTP request object, necessary for session operations
 	 * @return The current User
 	 */
-	public User getCurrentUser(HttpServletRequest request) {
+	public User getCurrentUser() {
 		// Retrieve the login from the session
-		String login = this.getCurrentUserLogin(request);
+		String login = this.getCurrentUserLogin();
 		
 		// The user can be out to date : force the update
 		if(currentUser != null && (! currentUser.getLogin().equals(login)) ){
@@ -180,7 +180,7 @@ public class SessionService implements Filter {
 		}
 		
 		// Check if the user object is already in cache
-		if(currentUser == null || (this.getCurrentUser(request).getLogin().equals(login)) ){
+		if(currentUser == null || (this.getCurrentUser().getLogin().equals(login)) ){
 			// Checks login for validity
 			if(login == null || login.equals("")){
 				currentUser = null;
@@ -194,42 +194,27 @@ public class SessionService implements Filter {
 	
 	/**
 	 * Returns whether the user is logged (is there a current User for this session)
-	 * @param request The current HTTP request object, necessary for session operations
 	 * @return true if there's a current user in the session, false otherwise
 	 */
-	public boolean isUserLogged(HttpServletRequest request){
-		return getCurrentUser(request) != null;
-	}
-
-	/* ========================= */
-	/* = Filter implementation = */
-	/* ========================= */
-	
-	/**
-	 * Inits the filter, and set the servletContext for this session service
-	 */
-	public void init(FilterConfig config) throws ServletException {
-		SessionService.servletContext = config.getServletContext();
-	}
-
-	/**
-	 * Fetch the current session data so that every JSP has access to it
-	 */
-	public void doFilter(ServletRequest request, ServletResponse response,
-			FilterChain chain) throws IOException, ServletException {
-		if(request instanceof HttpServletRequest){
-			SessionService.request = (HttpServletRequest) request;
-			init();
-		}
-		
-		chain.doFilter(request, response);
+	public boolean isUserLogged(){
+		return getCurrentUser() != null;
 	}
 	
 	/**
-	 * Clean the static attributes
+	 * Puts an object in the session
+	 * @param name The name of the attribute in the session
+	 * @param attribute The attribute object
 	 */
-	public void destroy() {
-		SessionService.servletContext = null;
-		SessionService.request = null;
+	public void setSessionAttribute(String name, Object attribute){
+		WebUtils.setSessionAttribute(request, name, attribute);
+	}
+	
+	/**
+	 * Retrieves an object from the Session
+	 * @param name The name of the attribute to retrieve
+	 * @return The attribute object
+	 */
+	public Object getSessionAttribute(String name){
+		return WebUtils.getSessionAttribute(request, name);
 	}
 }
diff --git a/YACOSWeb/src/org/yacos/web/system/session/SessionServiceFilter.java b/YACOSWeb/src/org/yacos/web/system/session/SessionServiceFilter.java
new file mode 100644
index 0000000..5a8262b
--- /dev/null
+++ b/YACOSWeb/src/org/yacos/web/system/session/SessionServiceFilter.java
@@ -0,0 +1,47 @@
+package org.yacos.web.system.session;
+
+import java.io.IOException;
+
+import javax.servlet.Filter;
+import javax.servlet.FilterChain;
+import javax.servlet.FilterConfig;
+import javax.servlet.ServletException;
+import javax.servlet.ServletRequest;
+import javax.servlet.ServletResponse;
+import javax.servlet.http.HttpServletRequest;
+
+/**
+ * Filter to initialize the SessionService singleton
+ * @author christiancorsano
+ *
+ */
+public class SessionServiceFilter implements Filter {
+	/**
+	 * Inits the filter, and set the servletContext for this session service
+	 */
+	public void init(FilterConfig config) throws ServletException {
+		SessionService.servletContext = config.getServletContext();
+	}
+
+	/**
+	 * Puts the request object into SessionService and tells it to init
+	 */
+	public void doFilter(ServletRequest request, ServletResponse response,
+			FilterChain chain) throws IOException, ServletException {
+		if(request instanceof HttpServletRequest){
+			SessionService.request = (HttpServletRequest) request;
+			SessionService.getInstance().init();
+		}
+		
+		// Continue the filter chain
+		chain.doFilter(request, response);
+	}
+
+	/**
+	 * Clean the static attributes
+	 */
+	public void destroy() {
+		SessionService.servletContext = null;
+		SessionService.request = null;
+	}
+}
\ No newline at end of file